FreeRDP before 3.29.0 contains a null pointer dereference vulnerability in smartcard device control request cleanup when reader-state decoding fails. Attackers can send malformed smartcard IRP requests with non-zero cReaders and truncated reader-state data to crash the process via null pointer access in free_reader_states functions.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Potential Mitigations
References
- https://github.com/FreeRDP/FreeRDP/commit/1cc783d4c78bd2f66d3a8582dfe70a663d141444
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78jj-45vh-jpm5
- https://www.vulncheck.com/advisories/freerdp-before-null-dereference-via-smartcard-cleanup
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-78jj-45vh-jpm5